Scenario Name: rs7_capacity
Disruption Type:_ Betweeness Centrality
Disruption Steps: 25
Report Date: 2024-04-17
The FTOT Link Removal tool assesses how resilient an optimal solution is to the removal of key links in the network. The tool removes road links from the network one-by-one in order of importance, each time re-solving for the optimal routing solution and the new scenario cost. Link importance is based either on a network property known as betweenness centrality or on the volume of vehicles on roadway links, depending on user selection.
Results for baseline scenario rs7_capacity are presented below.
Note: This scenario includes “high importance” edges that flow more than one commodity. As a result, multiple disruption scenarios were created and run for the same road edges.
The scatter plot below shows the relationship between the amount of commodity flowed in the optimal solution (y-axis) and the importance value (x-axis) of each edge used in the optimal solution of the baseline scenario. Each roadway segment in the optimal solution is represented by a point and is colored by commodity flowed. Edges flowing more than one commodity will have more than one point in the graph.
The graph below presents total scenario cost (or optimization objective value) versus the disruption step. At each step, another road link is removed. For example, in the first disruption step, the most important road link is removed from the network. In the second disruption step, the second most important link is removed, and so on. The color of the points corresponds to the number of roadway links (edges) remaining in the network after each disruption. Scenario costs will remain the same or increase with each successive disruption but should never decrease.
The maps below show the optimal road network in the baseline scenario and highlight up to 10 links by importance ranking or by scenario cost.
The map below plots the optimal route in the baseline scenario and highlights the top ten links by importance. Hover over each highlighted link to see its Net Source OID (link identifier) and rank.
The top ranked links for importance are removed from the network one-by-one in subsequent disruption scenarios. The map below plots the optimal road links in the baseline scenario and highlights each rank removed based on the resulting scenario cost in the associated disruption scenario.
The table below lists the segment links that were ranked by importance. Links were iteratively removed in subsequent disruption scenario in order of ranking up to the user-specified 25 disruption steps.